Moved completely webserver activities from index.js to server.js

Replaced `RequestHandler` with `generatePass`.
Now `generatePass` function returns JSON objects containing the pass stream or, otherwise, the error structure.

server.js

@@ -1,12 +1,14 @@
 const express = require("express");
+const path = require("path");
+const fs = require("fs");
 const passkit = require("./index");
+const Configuration = require("./config.json");
 
-passkit.init("./config.json");
+passkit.init(Configuration);
 
 const instance = express();
 
 instance.use(express.json());
-
 instance.listen(80, "0.0.0.0", function(request, response) {
 	console.log("Listening on 80");
 });
@@ -15,5 +17,39 @@ instance.get("/", function (request, response) {
 	response.send("Hello there!");
 });
 
-instance.get("/gen/:type/",passkit.RequestHandler);
-instance.post("/gen/:type/", passkit.RequestHandler);
+function manageRequest(request, response) {
+	let passName = (request.query.name ||
+					request.body.name ||
+					request.params.name ||
+					request.query.modelName ||
+					request.body.modelName ||
+					request.params.modelName) + "_" + (new Date()).toISOString().split('T')[0].replace(/-/ig, "");
+
+	response.set({
+		"Content-type": "application/vnd.apple.pkpass",
+		"Content-disposition": `attachment; filename=${passName}.pkpass`
+	});
+
+	passkit.generatePass({
+		modelName: request.params.modelName || request.query.modelName,
+		overrides: {}
+	})
+	.then(function(result) {
+		result.content.pipe(response);
+
+		// Writing to an output source
+		if (Configuration.output.dir && Configuration.output.shouldWrite && !fs.accessSync(path.resolve(Configuration.output.dir))) {
+			let wstreamOutputPass = fs.createWriteStream(path.resolve(Configuration.output.dir, `${passName}.pkpass`));
+			result.content.pipe(wstreamOutputPass);
+		}
+	})
+	.catch(function(err) {
+		console.log(err);
+
+		response.set("Content-Type", "application/json");
+		response.status(418).send(err);
+	})
+}
+
+instance.get("/gen/:modelName?", manageRequest);
+instance.post("/gen/:modelName?", manageRequest);